package com.sky.service.impl;

import com.github.pagehelper.Page;
import com.github.pagehelper.PageHelper;
import com.sky.constant.MessageConstant;
import com.sky.constant.PasswordConstant;
import com.sky.constant.StatusConstant;
import com.sky.dto.EmployeeDTO;
import com.sky.dto.EmployeeLoginDTO;
import com.sky.dto.EmployeePageQueryDTO;
import com.sky.entity.Employee;
import com.sky.exception.AccountLockedException;
import com.sky.exception.AccountNotFoundException;
import com.sky.exception.PasswordErrorException;
import com.sky.mapper.EmployeeMapper;
import com.sky.result.PageResult;
import com.sky.service.EmployeeService;
import com.sky.utils.CurrentHolder;
import com.sky.vo.EmployeePageVO;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;
import org.springframework.util.DigestUtils;

import java.nio.charset.StandardCharsets;
import java.time.LocalDateTime;
import java.util.List;

@Service
@Transactional//开启事务管理
public class EmployeeServiceImpl implements EmployeeService {

    @Autowired
    private EmployeeMapper employeeMapper;

    /**
     * 员工登录
     *
     * @param employeeLoginDTO
     * @return
     */
    public Employee login(EmployeeLoginDTO employeeLoginDTO) {
        String username = employeeLoginDTO.getUsername();
        String password = employeeLoginDTO.getPassword();

        //1、根据用户名查询数据库中的数据
        Employee employee = employeeMapper.getByUsername(username);

        //2、处理各种异常情况（用户名不存在、密码不对、账号被锁定）
        if (employee == null) {
            //账号不存在
            throw new AccountNotFoundException(MessageConstant.ACCOUNT_NOT_FOUND);
        }

        //密码比对
        // TODO 后期需要进行md5加密，然后再进行比对
        if (!password.equals(employee.getPassword())) {
            //密码错误
            throw new PasswordErrorException(MessageConstant.PASSWORD_ERROR);
        }

        if (employee.getStatus() == StatusConstant.DISABLE) {
            //账号被锁定
            throw new AccountLockedException(MessageConstant.ACCOUNT_LOCKED);
        }

        //3、返回实体对象
        return employee;
    }

    @Override
    public void save(EmployeeDTO employeeDTO) {

        Employee employee = new Employee();
        BeanUtils.copyProperties(employeeDTO, employee);
        //1.补充基本属性
        employee.setStatus(StatusConstant.ENABLE);
        employee.setPassword(DigestUtils.md5DigestAsHex(PasswordConstant.DEFAULT_PASSWORD.getBytes()));//设置密码为加密密码

        //2.执行保存
        employeeMapper.insert(employee);

    }

    /*
     * 员工分页查询
     * */
    public EmployeePageVO page(EmployeePageQueryDTO employeePageQueryDTO) {
        //1.设置分页参数
        PageHelper.startPage(employeePageQueryDTO.getPage(), employeePageQueryDTO.getPageSize());

        //2.执行分页查询
        List<Employee> list = employeeMapper.list(employeePageQueryDTO);
        Page<Employee> page = (Page<Employee>) list;


        //3.封装结果
        return new EmployeePageVO(page.getTotal(), page.getResult());
    }

    /*
     * 根据id查询员工
     * */
    @Override
    public Employee getById(Long id) {
        Employee employee = employeeMapper.getByEmployeeId(id);
        return employee;
    }

    /*
     * 启用或者禁用员工
     * */
    public void startOrStop(Integer status, Long id) {

        Employee e = employeeMapper.getByEmployeeId(id);
        if (e == null) {
            throw new RuntimeException("员工不存在");
        }
        e.setStatus(status);
        employeeMapper.update(e);

    }

    /*
     * 编辑员工
     * */
    public void update(EmployeeDTO employee) {
        Employee e = employeeMapper.getByEmployeeId(employee.getId());
        BeanUtils.copyProperties(employee, e);//把前端传来的数据赋给e


        employeeMapper.update(e);
    }


}
